P1380

Circuit Description

This diagnostic DTC is used to determine when the Electronic Brake and Traction Control Module (EBTCM) has lost the ability to provide rough road data to the PCM for misfire detection (DTC P0300). When the PCM sees this condition is present via serial data. DTC P1380 will set.

Conditions for Running the DTC

DTC P0300 is set and requesting the Malfunction Indicator Lamp (MIL) ON.

Conditions for Setting the DTC

Rough road indicator not being sent by EBTCM for 1.6 seconds out of the last 2 seconds.

Action Taken When the DTC Sets

^ The Malfunction Indicator Lamp (MIL) will not illuminate.
^ No message will be displayed.

Conditions for Clearing the DTC

^ A History DTC will clear after forty consecutive warm-up cycles with no failures of any non-emission related diagnostic test.
^ A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
^ Use a scan tool to clear DTCs.
^ Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Clearing Diagnostic Trouble Codes. Reading and Clearing Diagnostic Trouble Codes

Diagnostic Aids

If this DTC is set along with DTC P0300, it may represent an invalid misfire due to a loss of rough road data.

Several Antilock Brake ABS system problems could cause a loss of rough road indication from the EBTCM. All Antilock Brake System/Traction Control System (ABS/TCS) system problems and DTCs should be corrected first. Then duplicate the conditions under which DTC P1380 set and see if the problem reoccurs.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

2. If this DTC is set current, refer to ABS diagnosis and diagnose any EBTCM related (ABS/TCS) DTCs before diagnosing any PCM DTCs. If no EBTCM DTCs are present, perform the ABS System Check.
3. If this DTC is history, check for any current or history EBTCM DTCs and diagnose those before diagnosing any PCM DTCs.